Heat transfer enhancement in evaporating mini-layers: Effects of an inert gas flow

C. S. Iorio, O. A. Kabov

Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

4 Цитирования (Scopus)

Аннотация

When a layer of volatile liquid is subject to a flow of inert gas, a non-uniform distribution of the evaporation rate is generated all along the interface. Being evaporation stronger at the inlet boundary of the layer, because of the maximal efficiency of the inert gas flow in removing vapor from the interface, a thermal gradient along the interface is generated. Two opposite mechanisms regulate the movement of the interface: the shear stress of the gas that entrains the interface in the direction of the flow and the thermo-capillary stress that forces the interface to move against the flow direction. Moreover, because of the overall cooling of the interface due to the evaporative process, a gradient normal to the interface is also created. It results in a potentially unstable situation that is strongly influenced by the flow rate of inert gas, the layer thickness and the liquid thermo-physical properties. The goal of the present work is to study numerically if and how the dynamic evolution of the liquid layer is driven by the above-mentioned mechanisms. The main results concern the evaluation of the influence of the thermal instability patterns, eventually generated by the concurrent action of non-uniform evaporation and thermo-capillary motion, on the heat transfer at the bottom liquid. The distribution of temperature and velocity in the gas and liquid bulk phase for different mass flow rate of inert gas has also been of interest.

Язык оригиналаАнглийский
Название основной публикацииProceedings of the 5th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2007
Страницы879-883
Число страниц5
DOI
СостояниеОпубликовано - 2007
Событие5th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2007 - Puebla, Мексика
Продолжительность: 18 июн 200720 июн 2007

Другое

Другое5th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2007
СтранаМексика
ГородPuebla
Период18.6.0720.6.07

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physics and Astronomy(all)

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  • Цитировать

    Iorio, C. S., & Kabov, O. A. (2007). Heat transfer enhancement in evaporating mini-layers: Effects of an inert gas flow. В Proceedings of the 5th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2007 (стр. 879-883) https://doi.org/10.1115/ICNMM2007-30172